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What would be “minimal viable vehicle physics”? I’ve been prototyping an f-zero type game and so far have: - pressing forward increases thrust - thrust makes

by bemmu 3y ago

What would be “minimal viable vehicle physics”? I’ve been prototyping an f-zero type game and so far have: - pressing forward increases thrust - thrust makes vehicle accelerate forward - friction is higher for the component of velocity perpendicular to tires - vehicle turns faster when it is moving faster (I don’t actually simulate tire direction) - as a hack to make it feel a bit like drifting, make the vehicle visually turn more than it is actually turning Any simple thing I should add?

frenchie14 3y ago
I took a look at what's a part of my car controller[1] if you want some inspiration. A lot of these wouldn't make sense in an F-Zero type game - Wheel modifiers (which wheels are on road, grass, boost tiles, etc) - Control loss when airborne - Slow turning when at low speed (a bit different from yours since the impact drops to zero very quickly) - Speed / accel penalty when hitting a wall - Visually rotating the car (this is what happens when a player presses the turn key but the actual velocity rotation is handled separately) - Boost handling - Nudge the car to the side a little if it's trying to turn but is blocked by a wall - Acceleration, friction, breaking, and drift-breaking - Corrective side force (basically an extra friction perpendicular to velocity like you have) - Artificial speed limit (alternatively, you can include a drag component which applies a force proportional to the square of speed, but I've found it hard to get this feeling good in the past) - Velocity rotation to align velocity direction and visual direction. This is a minor effect - it's mostly handled by the other physics - Gravity - Out of bounds checks I think you've got the main pieces already. What's more important is understanding what you want your game to feel like and continuously tweaking until you get there [1] https://github.com/maxbize/PICO-8/blob/master/Driftmania/driftmania.lua#L641 https://github.com/maxbize/PICO-8/blob/master/Driftmania/dri...

by bemmu 3y ago

frenchie14 3y ago

I took a look at what's a part of my car controller[1] if you want some inspiration. A lot of these wouldn't make sense in an F-Zero type game - Wheel modifiers (which wheels are on road, grass, boost tiles, etc) - Control loss when airborne - Slow turning when at low speed (a bit different from yours since the impact drops to zero very quickly) - Speed / accel penalty when hitting a wall - Visually rotating the car (this is what happens when a player presses the turn key but the actual velocity rotation is handled separately) - Boost handling - Nudge the car to the side a little if it's trying to turn but is blocked by a wall - Acceleration, friction, breaking, and drift-breaking - Corrective side force (basically an extra friction perpendicular to velocity like you have) - Artificial speed limit (alternatively, you can include a drag component which applies a force proportional to the square of speed, but I've found it hard to get this feeling good in the past) - Velocity rotation to align velocity direction and visual direction. This is a minor effect - it's mostly handled by the other physics - Gravity - Out of bounds checks I think you've got the main pieces already. What's more important is understanding what you want your game to feel like and continuously tweaking until you get there [1] https://github.com/maxbize/PICO-8/blob/master/Driftmania/driftmania.lua#L641 https://github.com/maxbize/PICO-8/blob/master/Driftmania/dri...